MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 532 Mcqs, each offering curated multiple-choice questions to sharpen your Grade8 knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Island of Mauritius have a bird once called |
| A. | dodo |
| B. | duckbill |
| C. | ostrich |
| D. | hen |
| Answer» B. duckbill | |
| 102. |
In incineration plants not recycled waste is |
| A. | burned |
| B. | filter |
| C. | reduced |
| D. | discharged |
| Answer» B. filter | |
| 103. |
Calophyllum tree in Sarawak has ability to treat |
| A. | blood cancer |
| B. | AIDS |
| C. | Hepatitis |
| D. | polio |
| Answer» C. Hepatitis | |
| 104. |
By conserving environment there could be achievement of |
| A. | sustainable development |
| B. | dynamic equilibrium in environment |
| C. | maintained ecosystem |
| D. | conserved energy resources |
| Answer» B. dynamic equilibrium in environment | |
| 105. |
The wavelength of the high frequency sound wave is |
| A. | longer |
| B. | shorter |
| C. | same |
| D. | constant |
| Answer» C. same | |
| 106. |
Sound sensor when connected to data logger helps in measuring |
| A. | sound |
| B. | voice |
| C. | pitch |
| D. | frequency |
| Answer» B. voice | |
| 107. |
The chain of tiny bones in ear includes |
| A. | hammer |
| B. | anvil |
| C. | stirrup |
| D. | all of them |
| Answer» E. | |
| 108. |
A distinctive quality of a sound which depends on the frequency of sound is called a |
| A. | pitch |
| B. | frequency |
| C. | ultrasound |
| D. | infrasound |
| Answer» B. frequency | |
| 109. |
Sound travels at a speed of 343m/s in |
| A. | air |
| B. | water |
| C. | steel |
| D. | water |
| Answer» B. water | |
| 110. |
Homes and buildings are kept well ventilated by making use of |
| A. | conduction |
| B. | convection |
| C. | radiation |
| D. | convection currents |
| Answer» E. | |
| 111. |
Sea and land breezes are due to |
| A. | conduction |
| B. | convection |
| C. | radiation |
| D. | expansion |
| Answer» C. radiation | |
| 112. |
If one part of fluid is heated it |
| A. | expands |
| B. | less denser |
| C. | rises |
| D. | all of them |
| Answer» E. | |
| 113. |
Blocks of concrete which are few meters long are laid with gaps to overcome |
| A. | expansion |
| B. | conduction |
| C. | convection |
| D. | radiation |
| Answer» B. conduction | |
| 114. |
In bridges to overcome expansion there is use of |
| A. | rollers |
| B. | sliding joints |
| C. | both a and b |
| D. | allowance |
| Answer» D. allowance | |
| 115. |
When the speed decreases light bend towards |
| A. | normal ray |
| B. | incident ray |
| C. | reflected ray |
| D. | no ray |
| Answer» B. incident ray | |
| 116. |
The kind of shadow depends on the size and position of |
| A. | object |
| B. | light source |
| C. | both a and b |
| D. | sun |
| Answer» D. sun | |
| 117. |
A spinning of rainbow colors disc will produce |
| A. | multi shape spin |
| B. | white light |
| C. | dispersed light |
| D. | red light |
| Answer» C. dispersed light | |
| 118. |
In swimming pools they appear shallower than they are actual because of |
| A. | reflection |
| B. | refraction |
| C. | both a and b |
| D. | none |
| Answer» C. both a and b | |
| 119. |
The angle of incidence is equal to the angle of |
| A. | reflection |
| B. | refraction |
| C. | transmission |
| D. | incident |
| Answer» B. refraction | |
| 120. |
Stored feces are passed out through |
| A. | villi |
| B. | ileum |
| C. | rectum |
| D. | anus |
| Answer» E. | |
| 121. |
Cellulose compound which cannot be broken down our bodies is called as |
| A. | fiber |
| B. | vitamins |
| C. | carbohydrates |
| D. | fats |
| Answer» B. vitamins | |
| 122. |
Vitamin D is found in |
| A. | dairy products |
| B. | eggs |
| C. | liver |
| D. | all of them |
| Answer» E. | |
| 123. |
Benedict's solution help in testing for |
| A. | glucose |
| B. | fructose |
| C. | lactose |
| D. | sucrose |
| Answer» B. fructose | |
| 124. |
The breakdown of large food molecules in to smaller ones is called |
| A. | respiration |
| B. | digestion |
| C. | excretion |
| D. | elimination |
| Answer» C. excretion | |
| 125. |
Tiny hairs are moved due to vibrations in fluid in |
| A. | pinna |
| B. | ear drum |
| C. | hammer |
| D. | cochlea |
| Answer» E. | |
| 126. |
Signals are sent auditory nerves to |
| A. | brain |
| B. | heart |
| C. | ear drum |
| D. | retina |
| Answer» B. heart | |
| 127. |
The distance from one crest to another or one to another wave is called a |
| A. | wavelength |
| B. | frequency |
| C. | amplitude |
| D. | all of them |
| Answer» B. frequency | |
| 128. |
Unwanted sounds are called |
| A. | noises |
| B. | pleasant |
| C. | fruitful |
| D. | healthy |
| Answer» B. pleasant | |
| 129. |
Sound travels at speed of 1482m/s in |
| A. | air |
| B. | water |
| C. | steel |
| D. | water |
| Answer» C. steel | |
| 130. |
A pitch of sound can be change by changing |
| A. | string |
| B. | instrument |
| C. | tension |
| D. | temperature |
| Answer» D. temperature | |
| 131. |
The vibrations in stirrup are greater than ear drum due to arrangement in |
| A. | lever like manner |
| B. | ascending manner |
| C. | descending manner |
| D. | jointed manner |
| Answer» B. ascending manner | |
| 132. |
The brain interprets vibrations and electrical signals as |
| A. | sounds |
| B. | actions |
| C. | reactions |
| D. | movements |
| Answer» B. actions | |
| 133. |
Humans can hear the sound within range |
| A. | 20Hz - 20000Hz |
| B. | 10Hz-10000Hz |
| C. | 200Hz-20000Hz |
| D. | 30Hz--30000Hz |
| Answer» B. 10Hz-10000Hz | |
| 134. |
He symbol of decibel is |
| A. | Dc |
| B. | dB |
| C. | Dec |
| D. | dl |
| Answer» C. Dec | |
| 135. |
Glucose and Fructose are |
| A. | simple sugars |
| B. | complex sugars |
| C. | refined sugar |
| D. | sugarcane |
| Answer» B. complex sugars | |
| 136. |
In composition of fats the proportion of oxygen as compare to hydrogen is |
| A. | less |
| B. | more |
| C. | equal |
| D. | sufficient |
| Answer» B. more | |
| 137. |
The compounds which are made up of elements carbon, hydrogen and oxygen are called |
| A. | starch |
| B. | vitamins |
| C. | carbohydrates |
| D. | sugar |
| Answer» D. sugar | |
| 138. |
Algae and fungus living together forms |
| A. | lichens |
| B. | leeches |
| C. | ticks |
| D. | hyphae |
| Answer» B. leeches | |
| 139. |
Organisms compete for their |
| A. | food |
| B. | reproduction |
| C. | growth |
| D. | survival |
| Answer» E. | |
| 140. |
Behavioral modifications of plants to prevent loss of water and conserve food and energy is |
| A. | transpiration |
| B. | shedding of leaves |
| C. | hibernating |
| D. | migration |
| Answer» C. hibernating | |
| 141. |
A group of organisms of same specie which are living and reproducing at same era is called |
| A. | diversity |
| B. | biodiversity |
| C. | habitat |
| D. | population |
| Answer» E. | |
| 142. |
Organism fool their predators by |
| A. | camouflage |
| B. | mimicry |
| C. | inflating |
| D. | blending |
| Answer» C. inflating | |
| 143. |
Human beings is able to satisfy his needs by changing |
| A. | temperature |
| B. | environment |
| C. | habitat |
| D. | region |
| Answer» C. habitat | |
| 144. |
If atmosphere is released with lots of pollutants it is |
| A. | pollution |
| B. | forestation |
| C. | deforestation |
| D. | habituation |
| Answer» B. forestation | |
| 145. |
If ice on polar-regions will melt away animals will lose their habitat like |
| A. | polar bears |
| B. | seal |
| C. | both a and b |
| D. | trout |
| Answer» D. trout | |
| 146. |
A cleared are from trees can require a time to grow again which is equal to |
| A. | 1 year |
| B. | 20 years |
| C. | 50 years |
| D. | 500 years |
| Answer» D. 500 years | |
| 147. |
The harmful substances which damage the environment are called |
| A. | pollutants |
| B. | compounds |
| C. | gases |
| D. | waste material |
| Answer» B. compounds | |
| 148. |
Maintenance of oxygen and carbon dioxide in air is done by |
| A. | forests |
| B. | humans |
| C. | animals |
| D. | global warming |
| Answer» B. humans | |
| 149. |
A gas which is major gas in trapping heat and prevent it from escaping is |
| A. | oxygen |
| B. | ozone |
| C. | carbon dioxide |
| D. | nitrogen |
| Answer» D. nitrogen | |
| 150. |
Rats, pigs and monkeys brought by human on island eaten eggs of |
| A. | dodo |
| B. | duckbill |
| C. | ostrich |
| D. | hen |
| Answer» B. duckbill | |